Shock-absorber.



' nemen PR'oUTiLj or PULLMAN, ILLINOIS.

' sHocKLABsomaEn.

lo al( whom it may. concern: Y v j Be it. ,known that I, Enorm' Pnoorr, a.

' citizen of the United 'Sta-tes, residing'a't Pullman, in the county of Cook and State,

of Illinois, have invented new and useful imprm'ements 'in Shock-Absorbers, ot'- which the following is a l'ull, clear, concise, and

, exact description, reference being had to the this speeiication. 4 n

My invention relates toaspx-'ing device Vaceoinpanyins; drawing, forming apart of vfor absorbing fha shocks imparted to railroad cars', automobile bodies and the like I during their motion, or those imparted to the draw bars of trains during starting and stopping, ror dui-mg the running of the cars. My device .is useful` in any connection `Where a part which should be protected from shoclrs` vibr:itions,.etc., is connected to Y' another part which is Subl'tto such shocks andfi'brations. Y

` Foren understanding of my invention A reference is to be had to the following de'- scription-and to the accompanying drawings in such 'a manner as to extend substantially and in `which l have illustrated, byway ot' ex-y ample, several embodiments of myinvenlion.

In the drawings z--Figure l is a pla-n view of my improved shock absorber, as applied to the draw bar of arailroad car, the device being shown with one half of thecasing removed. Fig. 2 is a :cross section on the line :7J-0f l? ig.'1. Fig. 3 illustrates a modified forinof casing which, in some cases, maybe used in place of that illustrated -i railroad ear bo( ies, and Eig. 5 -is ajvertical section of a shoclrabsorber according to my invention of a character adapted for use in supporting the'bodies of automobiles and the like. i

In carrying my in 'cntion into effect, rI prov-idea substantially flat volute spring, that is, a spring formed by windings. rod or strip of metal upon itself to' form a substantially fiat spiral coil. I secure th'e outer convolution of this spring to the member which is to he protected from shocks or vibrations in such a manner that the plane of the spring is substantial ly at right angles yto theline or plane along which the shocks or .ibrations are liabie to be communicated. I connect themember, the shocks or vibrations of which are to be absorbed, to the spring spcvcicatiml of Letters Patent. Application filed Iiecember 29, K190i?.l Serial No. 535,391. y

Figs. 1" Fig; i is :l sectional elevation oa shock absorber according to my invention of character adaited for 'use in supporting'V i Patented oca; 1910.

i axially thereof. Itis obvious, however, that` i the position ofthe-member which is tobe protected from 'shocks and vibrations and the member the shoclgs and vibrations of which lare to be absorbed, may be reversed if such is found to be a preferable arrangement. It is generally desirable, in devices to a shock should increase more rapidlyl than shock, as is the oase with ordinary springs stretched or compressed within their elastic limits. In order that the resistance of kthe spring to distortion may .increase more rapor the other, or on both sides, of the spring.

lotions of the spring will engageit to a greater and greater extent if the spring is to in the direction ofthe seat. The effect of spring becomes less resilient and will offer a greater proportionate resistance tothe shock. n i

Referring noiv to the drawings and ar-k 'ticulariy to the forni illustrated in igs l and 2.the spring 10, as stated above, is

Y spring is contained in a chamber ormed in a tivo part easing, the two parts', 1.1 and l2, ot' this casing being secured together by rivets er the like. ,The parts 1l and 12 of 13 and 14 through 'which the draw bar 15 may pass. form a reduced portion '16 which passes lthrough the open eenterof the spring an'd is secured therein by mea-nsof one or more Vcollars 1:7 suitablyattached thereto. The draw bar thus extends axially of the spring. The chamber formed between the parts l1 and 12 of theeasingr is of'such sha p as to present two Vconical seats;l 1S an f 19,

10 will engage when'the springt; is distorte inone direction or another. Thus-a, slight jsh'oclr imparted to thedraw bar v toward the left will causen portion of the second con-- volution of the; spring to engage the Seat will be the portion of the spr' 1 enea 7 1' the seat. f'the shock be stiihig of the innermost convolution is com of this-character, that the resistance offered j l f merely in proportionto the violence of they idly Iprovide a cone shaped seat on one side entras PATENT n OFFICE. if);

The shape of the seat is such that theconvo- 'l 'I distorted by anincreasingforce applied there- L this is that, one or more of the convolutions having seated, the remain-ing part of the w 'i substantially flat and of volute form. The

the casing arefforxnedy withA Central lmnsf.

The latteris turned:y down to against which the convolutions of the springv Y los i IS. and the greater the shock-is the greater. I i

11a i the whole-of the spring, with the exception7 l tained between the collar 1'? sind the shoulder formed by ihereduced portion 16 of the draw bar, will engage the sent. It willv thusI besecn that' etl'ectivc resistance of the upon it increises.

spring becomes greater the. load 4placed `Instead of the smooth conical sent 18 or 19 l may provide n spn'ally descending ledge.

20 (F ig. 3) of such shape as to forni a fiat sent, for the spring when the latter is distorted.

When the shock absorber `is to be `for supporting railroad ears it is usually nnnecesseryto Vprovide e sent for the spring upon the'lower side thereof. I, therefore,

provide for such'pnrposes an inverted openended eoniril casing 21 v(Fig. Lt) having at f its upper end a flange 2&2- for enabling it to be secured to the car body. The casing is so formed internally as to present. a' shallow cylindrical portion in which the spring 10 may lie and a conical seat 23 similar to theseat 18 but, having its sides set somewhat more steeply `in order to .allow 'a greater resiliency to the spring. y

24 is a: supporting pm haring n reduced portion 25 whichv enters they opening at the. y center of the spring and forms a shoulder vwhich acts as asupport. for thespring.. The

spring is shown .in F ig. 4 as being somewhat bowed up by the weight of theY car.

The modification shownl in Fig. 5 isa dupi device consisting of a double casing haring two portionsflt, 2G, each somewhat similar to the casing shown in Fig. 4. vThis device is intended foi-'use in the supporting of automobile bodies, and insuch work it is desirable to provide. besides the eenlcal seat above the spring, et *ses* a portion of such a sent beneath the spring to provide for the .portions 26,. 26 :ind the cover portions are therefore cut oit soins to provide seats for only the outer conrolutions of the springs. Bolts 28. extending upward from't-he Wheel frame of the nutomobile, enter the open centex-s of the spring!Y 11.) :ind here shoulders. thereon upon which the spi-i nids 9.0 serving to innintnin the cor Having thus described ing.' I claim iszinvention, what,

` v1. A dei .ce for the por? se set forth comkprising :i member forme depression. substantiel l zit volute spring mounted inthe larger pn:

t. of Vsaid depres-y with n tziperiiip;A :t

sion` the depressit'ln being of `such character.

tlnit the eoiivolntions of the spring will engage the surface ,thereof when the spring isY Ydistorted.'.:ind n set-ond ineniber axially disposed with relation to the spring and engaging the lutter. f

2. A device forthe purpose set. forth con` vprision n'. member formed with 'n smooth tapering.r depression. n .substantially tint volute spring mounted in the lnrger pero of said depression. the depression being o such ehnrncter-that the conrointions of the spring will'engnge the surface thereof when the spring is distorted, and a vsecond member axinllydisposed withrelntion to the spring und engnging the lutter. i.

, 3. A device for the purpose set forth coni- -priring n easing consistingo two parte,

each having a conicnl depression .'formed therein and kso disposed as to register with the depression formed in the other portion, a tie-* Yolutespring; secured between the portionsof said casing; in .suchY position that, when distorted in one direction or the other, its conyolntions wiil sent against the wall of one 'or the other o said depressions. and a supporting nienioer connected to said spring and extending axially' thereof.

4. A device for the pnl-po: prising: a casinghacing i. pl-.iir of oppositely disposed co'oicni depressions, n. fla-t volute spring' dispose-fl in scidV casi-ng in sneh position that the convolutions of the spring will upon the woll o `one or the other of said depressions when the spring is distorted in one or the other direction.` and :i supporting member conf nceted to sind spring :ind extending axially thereof. A

In witness whereof, I have hereunto subscribed iny naine in the presence of two witnesses. A

y nNoo-H .mon-TY.-

y Witnesses:

CHARLES G. COPE, E. R. KING.

set forth coml therein n. 

